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data sheet single-cell li-ion charger ic wi th system power management aur9807 nov. 2011 rev. 1. 0 bcd semiconductor manufacturing limited 1 general description the aur9807 is a single-cell li-ion charger ic with system power management feature. it charges the battery and power the system simultaneously. the maximum charging current (up to 1.5a) is set by external resistor for fast charging. the output voltage for the system is regulated to a nominal value (three different versions available: 4.4v, 5v or 6v); the actual value of the output voltage depends on the input voltage from the adapter, the charging current and the system loading. with the decrease of the input voltage or the increase of the system loading current, the output voltage drops. when the output voltage drops to a predetermined value (v apm-reg ), the active power management function is activated and tries to maintain the output voltage at v apm-reg ; the aur9807 will suffice the system loading with first priority and reduce the charging current temporarily, i.e. under heavy load condition, the aur9807 charges the battery with the remaining available current to keep the output voltage at v apm . in this manner, the charge and discharge cycle of the battery can be reduced. it is possible that the aur9807 fails to maintain the output voltage at v apm-reg ; for example, when the system loading current exceeds the capability of the current-limiting ac adapter. in this scenario, the output voltage drops to the battery voltage, and the system is allowed to draw current from the battery. the aur9807 is available in qfn-4.53.5-20 package. features ? qfn package ? active power management (apm) for simultaneously powering the system and charging the battery ? total current supported up to 2 amperes (system loading having higher priority on the budget) ? automatic power source selection (ac adapter or battery) ? 40m ? power path for the battery to supply the system power efficiently ? junction temperature detection and thermal regulation during charging process ? external led indicating charger and power good status as well as fault condition ? thermal, short-circuit, and reverse current protection ? short-circuit protection in the low power consumption sleep mode ? sysoff function to cut off the path between the system and the battery ? built-in over voltage protection up to 18v applications ? battery-powered devices or equipment ? mobile phones, digital cameras and mp3 players ? radios, other hand-held games and instruments ? solar power system figure 1. package type of aur9807 qfn-4.53.5-20
data sheet single-cell li-ion charger ic wi th system power management aur9807 nov. 2011 rev. 1. 0 bcd semiconductor manufacturing limited 2 pin configuration d package ( qfn-4.53.5-20 ) exposed pad 1 2 3 4 5 10 9 8 6 19 18 17 16 15 14 13 12 11 20 pin 1 mark 7 vref stat1 stat2 in bat bat iset2 mode ce iset1 sysoff ts apm tmr out /pg gnd gnd out out figure 2. pin configuration of aur9807 (top view) data sheet single-cell li-ion charger ic wi th system power management aur9807 nov. 2011 rev. 1. 0 bcd semiconductor manufacturing limited 3 pin description pin number i/o pin name function 1 o vref internal reference; vref output capacitor not required, but one with a value of 0.1f is recommended. 2 o stat1 charge status flag 1 (open-drain) 3 o stat2 charge status flag 2 (open-drain) 4 i in chip input voltage 5 , 6 i/o bat battery connection; charging or discharging all through this pin 7 i iset2 usb mode total current selection (high=450ma, low= 90ma) and ac mode charge current selection (high=full current, low=half current) 8 i mode set aur9807 in ac(high) or usb(low) mode 9 i ce chip enable (active high) 10 i/o iset1 set the maximum charging current 11 i sysoff cut off the power path between the battery and the output pin 12 i/o ts battery temperature sensing 13 i apm active power management set point no need for capacitors 14 i/o tmr timer program by external resistor connected to this pin. tying tmr and vref together to disable the safety timer 15 , 16 , 17 o out system output 18 o /pg power-good status flag (open-drain) 19 , 20 i gnd chip ground data sheet single-cell li-ion charger ic wi th system power management aur9807 nov. 2011 rev. 1. 0 bcd semiconductor manufacturing limited 4 functional block diagram charge control timer and display logic ac charge enable bat charge enable 500ma/100ma fast precharge v out iset2 /pg stat1 stat2 1c - 500ma c/s - 100ma v in v bat sleep v term v i(iset1) termation v lowv v bat precharge v rch v bat recharge ce mode 1v power source selection ts v ltf thermal shutdown v htf apm 1v in q1 out q2 vref 3.3v short-circuit recovery bat iset1 v out v set 100ma 500ma power source selection v isense tmr oscillator v out(reg) i sense gnd uvlo fault recovery v bat bat short-circuit recovery t j(reg) t j v apm v set v set v i(iset1) v bat(reg) v bat i amp v i(iset1) sysoff v out v bat i ts 1 2 3 4 5, 6 7 8 9 10 11 12 13 14 15, 16, 17 18 19, 20 figure 3. functional block diagram of aur9807 data sheet single-cell li-ion charger ic wi th system power management aur9807 nov. 2011 rev. 1. 0 bcd semiconductor manufacturing limited 5 g: green ordering information aur9807 circuit type package temperature range output voltage part number marking id packing type 4.4v, cv mode aur9807vfgd a9807vfg tape & reel 4.4v, done AUR9807DFGD a9807dfg tape & reel 5v, cv mode aur9807vigd a9807vig tape & reel 5v, done aur9807digd a9807dig tape & reel 6v, cv mode aur9807vsgd a9807vsg tape & reel qfn-4.5x3.5-20 -40 to 85 c 6v, done aur9807dsgd a9807dsg tape & reel bcd semiconductor's pb-free products, as designated with "g" in the part number, are rohs compliant and green. d: qfn-4.5x3.5-20 output voltage vf: 4.4v, cv mode df: 4.4v, done vi: 5v, cv mode di: 5v, done vs: 6v, cv mode ds: 6v, done cv mode: after charge done, charger will stay in constant voltage mode until time out. done: after charge done, charger will shut down until the battery voltage drops below the battery recharge threshold. data sheet single-cell li-ion charger ic wi th system power management aur9807 nov. 2011 rev. 1. 0 bcd semiconductor manufacturing limited 6 absolute maximum ratings (note 1) parameter symbol value unit supply input voltage v in -0.3 to 18 v v bat , v ce , v apm , v /pg , v mode , v out , v iset1 , v iset2 , v stat1 , v stat2 , v ts -0.3 to 7 v v ref -0.3 to v out +0.3 v input voltage v tmr -0.3 to v out +0.3 v input current i in 3.5 a i out 4 a output current i bat -4 to 1.5 a output source current (in regulation at 3.3v v ref ) i ref 30 ma output sink current i /pg , i stat1 , i stat2 15 ma thermal resistance (junction to ambient) ja 52 c/w storage temperature t stg -65 to 150 c junction temperature t j -40 to 150 c lead temperature (soldering, 10 seconds) 300 c esd (human body model) v hbm 2000 v esd (machine model) v mm 200 v note 1: stresses greater than those listed under ?absolute maximum ratings? may cause permanent damage to the device. these are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under ?recommended operating co nditions? is not implied. exposure to ?absolute maximum ratings? for extended periods may affect device reliability. recommended operating conditions parameter symbol min max unit aur9807dsgd, aur9807vsgd 4.35 6.3 v supply voltage AUR9807DFGD,aur9807vfgd, aur9807digd, aur9807vigd v in 4.35 5.5 v input current i in 2 a operating junction temperature range t op -40 125 c data sheet single-cell li-ion charger ic wi th system power management aur9807 nov. 2011 rev. 1. 0 bcd semiconductor manufacturing limited 7 electrical characteristics t a =25 o c, v in is within the recommended range, unless otherwise specified. parameter symbol test condition min typ max unit active supply current i in(sply) v in >4.35v 1.1 2 ma sleep mode current into bat pin i bat(slp) v in data sheet single-cell li-ion charger ic wi th system power management aur9807 nov. 2011 rev. 1. 0 bcd semiconductor manufacturing limited 8 electrical characteristics (continued) t a =25 o c, v in is within the recommended range, unless otherwise specified. parameter symbol test condition min typ max unit precharge set voltage v prechg 225 250 275 mv de-glitch time between fast charge and precharge transition t dglf t fall =100ns, 10mv overdrive, v bat decreasing below threshold 22.5 ms charging-current regulation fast charge current range i chg v bat >v lowv , mode=high 100 1000 1500 ma bat to out pull-up r pbat v bat <1v 1000 ? battery charge current set voltage (1) v set voltage on iset1 2.4 2.5 2.6 v 100mav rch , i term =(k set x v term )/ r set 10 150 ma v bat >v rch , mode=high 230 250 270 charge done set voltage, measured on iset1 v term v bat >v rch , mode=low 95 100 130 mv temperature sense comparators high voltage, low temperature threshold v ltf temp fault at v ts >v ltf 2.5 v low voltage , high temperature threshold v htf temp fault at v ts data sheet single-cell li-ion charger ic wi th system power management aur9807 nov. 2011 rev. 1. 0 bcd semiconductor manufacturing limited 10 electrical characteristics (continued) t a =25 o c, v in is within the recommended range, unless otherwise specified. parameter symbol test condition min typ max unit charger sleep thresholds sleep-mode entry threshold v slpent v bat +0.125 sleep-mode exit threshold v slpexit v bat +0.195 mv de-glitch time de-glitch time for charge done detection, temperature fault, recharge and sleep mode detection t deg 18.75 ms start-up control boot-up boot-up time t boot-up on the first application of input low 120 150 180 ms switching power source timing switching power source from input to battery t sw-bat when input applied. measure from: [/pg: lo hi to i in >5 ma ] 50 s thermal shutdown regulation temperature trip t shtdwn t j (q1 and q3 only) 150 thermal hysteresis t j (q1 and q3 only) 25 temperature regulation limit t j(reg) t j (q2) 110 130 c uvlo under-voltage lockout v uvlo decreasing v in 2.45 2.5 2.65 v input power detection threshold v in(dt) input power detected when v in >v bat + v in(dt) v bat =3.6v v in : 3.5v 4v 55 80 130 mv hysteresis 27 mv vref output output regulation voltage v ref active only if adp or usb is present 3.3 v regulation accuracy -5 +5 % output current i ref 20 ma on resistance r ds(on) out to vref 50 ? output capacitance c out 1 f data sheet single-cell li-ion charger ic wi th system power management aur9807 nov. 2011 rev. 1. 0 bcd semiconductor manufacturing limited 11 electrical characteristics (continued) t a =25 o c, v in is within the recommended range, unless otherwise specified. short circuit protection short-circuit recovery between bat to out i osh1 pull-up source from bat to out for short-circuit recovery v out data sheet single-cell li-ion charger ic wi th system power management aur9807 nov. 2011 rev. 1. 0 bcd semiconductor manufacturing limited 12 typical performance characteristics (continued) figure 6. charge current vs. input voltage figure 7. power on figure 8. sysoff floating figure 9. mode pin pull low v in 2v/div v in 2v/div v out 2v/div i chg 0.5a/div v out 2v/div i chg 1a/div v sysoff 2v/div time 20ms/div time 1ms/div v out 2v/div v in 2v/div i chg 0.5a/div v mode 2v/div time 200 s/div data sheet single-cell li-ion charger ic wi th system power management aur9807 nov. 2011 rev. 1. 0 bcd semiconductor manufacturing limited 13 typical performance characteristics (continued) figure 10. iset2 pin pull high figure 11. iset2 pin pull low figure 12. mode pin pull high v out 2v/div v in 2v/div i chg 0.5a/div v iset2 2v/div v out 2v/div v in 2v/div i chg 0.5a/div v iset2 2v/div v out 2v/div v in 2v/div i chg 0.5a/div v mode 2v/div time 40 s/div time 40 s/div time 400 s/div data sheet single-cell li-ion charger ic wi th system power management aur9807 nov. 2011 rev. 1. 0 bcd semiconductor manufacturing limited 14 power flow the aur9807 selects the power source automatically. in the absence of the input source (ac adapter or usb), the battery is chosen to power the system. under this circumstance, the aur9807 consumes less than 5 ampere; the power path resistance from the battery to the system is only 40m ? (3) ; all these guarantee a high efficiency and elongate the battery discharge time. with this stringent sleep current budget (<5a), the aur9807 is still able to detect an output short condition and cuts off the power path between the battery and the system under short condition. with the input power present, the mode pin sets the aur9807 in adapter mode or usb mode. in adapter mode, the aur9807 does not limit the total current directly, current limiting phenomenon occurs through adaptive power management in response to the output voltage drop. the resistor connected to iset1 pin sets the maximum charging current. this maximum charging current can be halved by pulling down the iset2 pin. in usb mode, the aur9807 will limit the total current within 450ma (iset2=high) or 90ma (iset2=low). the maximum charging current is still set by the resistor connected to iset1 pin; however, because of this current limiting feature, the actual charging current is usually less than 450ma (or 90ma). (3) q2 design value is 40m ? . power source selection and charge current setting mode pin level ac adapter loading power source charge current setting yes usb iset1, limitation depends on iset2 setting low no battery n/a yes ac adapter iset1, half charging rate by setting iset2 to low high no battery n/a data sheet single-cell li-ion charger ic wi th system power management aur9807 nov. 2011 rev. 1. 0 bcd semiconductor manufacturing limited 15 charge function descriptions charge flow maximum charging current setting pre-charge and charge done current setting mode=high iset2=high 2.5 v , r k v i max set, set set set chg = = mode ac ; 10 i i ; 10 i i max chg, term max chg, prechg = = mode=high iset2=low 1.25 v , r k v i max set, set set set chg = = mode ac ; 20 i i 20 i i max chg, term max chg, prechg = = mode=low iset2=high/l ow 2.5 v , r k v i max set, set set set chg = = mode usb ; 25 i i 10 i i max chg, term max chg, prechg = = data sheet single-cell li-ion charger ic wi th system power management aur9807 nov. 2011 rev. 1. 0 bcd semiconductor manufacturing limited 16 charge function descriptions (continued) the maximum charging current, the pre-charge current and charge done current setting are given in the above table. the charging process begins with a pre-charge phase; when the battery voltage reaches the pre-charge threshold v lowv , the charger enters the constant current mode. at this stage, the charger tries to charge the battery with the maximum charging current (a constant); however, the actual charging current may be lower due to active power management activated by large system loading or insufficient input current capability. the thermal fold-back mechanism al so reduces the actual charging current when the junction temperature is over 110c. the battery voltage rises gradually with the constant current entering the battery. when the battery voltage reaches v bat(reg) , the charger enters the constant voltage mode. at this stage, the charger keeps the battery voltage at v bat(reg) with a decreasing char ging current. when the charging curr ent drops below the charge done current setting, nominally the charging process is complete (this can be observed from the external indicator). depending on different versions, after the charge done status indicated, the charger will stop providing charging current completely or stay in constant voltage mode till time out. when the battery voltage drops below the recharge threshold, a new charge cycle begins. example: with a r set =1k ? , the maximum charging current is about 1a for iset2=high and 0.5a for iset2=low. the pre-charge current i prechg is 100ma. the charge done current setting is 100ma for ac mode and 40ma for usb mode. note the absolute values of pre-charge current and charge done current setting do not vary with iset2. power source selecting out ref i. v in data sheet single-cell li-ion charger ic wi th system power management aur9807 nov. 2011 rev. 1. 0 bcd semiconductor manufacturing limited 17 ntc li battery 1f bat ts v ltf v htf 100a aur9807 logic unit charge function descriptions (continued) active power management (apm) ? ac mode (mode=high) i. v apm-reg |